package com.bi.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.bi.dto.TaoBaoIpReturnDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
/**
 * @Author: w
 * @Date: 2019/5/20 15:44
 * @Version 1.0
 */
@Slf4j
public class IPUtil {
    /**
     * 获取ip地址
     * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
     * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
     * @param request
     * @return
     */
    public static String getIP(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return "0:0:0:0:0:0:0:1".equals(ip)?"127.0.0.1":ip;
    }

    public static void main(String[] args) {
        // 测试ip 221.232.245.73 湖北武汉
        String ip = "183.192.179.16";
        try {
             TaoBaoIpReturnDTO dto = getAddress("format=json&ip="+ip, "utf-8");
             System.out.println(dto.toString());
        } catch (Exception e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
        }
        // 输出结果为：中国 湖北省 武汉市
    }


    /**  3 * @param content
     *   请求的参数 格式为：name=xxx&pwd=xxx
     * @param encodingString
     *   服务器端请求编码。如GBK,UTF-8等
     * @return
     */
    public static TaoBaoIpReturnDTO getAddress(String content, String encodingString) {
        // 这里调用pconline的接口
        //String urlStr = "http://ip.taobao.com/service/getIpInfo.php";//报502错误
        String urlStr = "http://int.dpool.sina.com.cn/iplookup/iplookup.php";
        // 从http://whois.pconline.com.cn取得IP所在的省市区信息
        String returnStr = getResult(urlStr, content, encodingString);
        TaoBaoIpReturnDTO returnDTO = null;
        // 处理返回的省市区信息
        if (returnStr != null) {
            //转json
            JSONObject jsonObject = JSONObject.parseObject(returnStr);
            JSONObject object = (JSONObject) jsonObject.get("data");
            // json转实体类
            returnDTO = JSON.toJavaObject(object, TaoBaoIpReturnDTO.class);
        }
        return returnDTO;
    }

    public static String getAddress(String ip){
        log.info(ip);
        TaoBaoIpReturnDTO dto = getAddress("ip="+ip, "utf-8");
        if(dto==null) return null;
        return dto.getCountry()+"|"+dto.getRegion()+"|"+dto.getCity();
    }



    /**
     * @param urlStr
     *   请求的地址
     * @param content
     *   请求的参数 格式为：name=xxx&pwd=xxx
     * @param encoding
     *   服务器端请求编码。如GBK,UTF-8等
     * @return
     */
    private static String getResult(String urlStr, String content, String encoding) {
        URL url;
        HttpURLConnection connection = null;
        try {
            url = new URL(urlStr);
            connection = (HttpURLConnection) url.openConnection();  // 新建连接实例
            connection.setConnectTimeout(2000);                     // 设置连接超时时间，单位毫秒
            connection.setReadTimeout(2000);                        // 设置读取数据超时时间，单位毫秒
            connection.setDoOutput(true);                           // 是否打开输出流 true|false
            connection.setDoInput(true);                            // 是否打开输入流true|false
            connection.setRequestMethod("POST");                    // 提交方法POST|GET
            connection.setUseCaches(false);                         // 是否缓存true|false
            connection.connect();                                   // 打开连接端口
            DataOutputStream out = new DataOutputStream(connection.getOutputStream());// 打开输出流往对端服务器写数据
            out.writeBytes(content);                                // 写数据,也就是提交你的表单 name=xxx&pwd=xxx
            out.flush();                                            // 刷新
            out.close();                                            // 关闭输出流
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));// 往对端写完数据对端服务器返回数据 ,以BufferedReader流来读取
            StringBuffer buffer = new StringBuffer();
            String line = "";
            while ((line = reader.readLine()) != null) {
                buffer.append(line);
            }
            reader.close();
            return buffer.toString();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                connection.disconnect();                            // 关闭连接
            }
        }
        return null;
    }

    /**
     * unicode 转换成 中文
     *
     * @author fanhui 2007-3-15
     * @param theString
     * @return
     */
    public static String decodeUnicode(String theString) {
        char aChar;
        int len = theString.length();
        StringBuffer outBuffer = new StringBuffer(len);
        for (int x = 0; x < len;) {
            aChar = theString.charAt(x++);
            if (aChar == '\\') {
                aChar = theString.charAt(x++);
                if (aChar == 'u') {
                    int value = 0;
                    for (int i = 0; i < 4; i++) {
                        aChar = theString.charAt(x++);
                        switch (aChar) {
                            case '0':
                            case '1':
                            case '2':
                            case '3':
                            case '4':
                            case '5':
                            case '6':
                            case '7':
                            case '8':
                            case '9':
                                value = (value << 4) + aChar - '0';
                                break;
                            case 'a':
                            case 'b':
                            case 'c':
                            case 'd':
                            case 'e':
                            case 'f':
                                value = (value << 4) + 10 + aChar - 'a';
                                break;
                            case 'A':
                            case 'B':
                            case 'C':
                            case 'D':
                            case 'E':
                            case 'F':
                                value = (value << 4) + 10 + aChar - 'A';
                                break;
                            default:
                                throw new IllegalArgumentException(
                                        "Malformed  encoding.");
                        }
                    }
                    outBuffer.append((char) value);
                } else {
                    if (aChar == 't') {
                        aChar = '\t';
                    } else if (aChar == 'r') {
                        aChar = '\r';
                    } else if (aChar == 'n') {
                        aChar = '\n';
                    } else if (aChar == 'f') {
                        aChar = '\f';
                    }
                    outBuffer.append(aChar);
                }
            } else {
                outBuffer.append(aChar);
            }
        }
        return outBuffer.toString();
    }
}
